Living in Perth myself, I'm sure there are not THAT many people going to the US each day- let alone New York (but really, what would I know)
I think Sami sometimes throws in random demand for fun, in MT#4 I operated 4 daily A333 (1400 seats) from Jakarta to Toronto- yet in real life no such flight exists...
True, but there probably is good demand for Jakarta from Toronto (though probably not 1000+ per day) just as there is for Singapore and a bunch of other destinations that you can't take direct ultra long haul flights from Toronto. (I've flown to Jakarta, Singapore and to Wellington, NZ in the past few years from Toronto and always had to connect through a US Pacific hub). And surely this is true for a number of major airports with significant ultra LH demand. It seems to me that this is one of the distinctions between AWS and 'real life'. Most major carriers, especially ultra LH providers, route many of their flights through hubs that pool demand rather than flying 5000+ NM direct. It makes economic sense to do so. Yet we can't really do this in AWS (clearly, technical stops are not the same).
As to strange demand, I've seen a few examples in MT5 too. I'm currently based at Brasilia and, using Canadian examples again, why is it that the demand to Montreal is 200% more than to Toronto when the latter airport is, in general, 40% busier? But no matter, such variations make for more interesting game play.